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authorFangrui Song <maskray@google.com>2019-08-02 07:18:07 +0000
committerFangrui Song <maskray@google.com>2019-08-02 07:18:07 +0000
commit681afdf34bb16d1877e984d157dfd389a79a4256 (patch)
tree4e3f851ec5cfff68846a11843577ed58d4fdd430 /test/tsan/fd_dup_norace2.cc
parent871e3822d6679af8f7cfa763b65258e47f2d8d69 (diff)
downloadcompiler-rt-681afdf34bb16d1877e984d157dfd389a79a4256.tar.gz
compiler-rt: Rename .cc file in test/tsan to .cpp
Like r367463, but for test/tsan. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@367656 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/tsan/fd_dup_norace2.cc')
-rw-r--r--test/tsan/fd_dup_norace2.cc60
1 files changed, 0 insertions, 60 deletions
diff --git a/test/tsan/fd_dup_norace2.cc b/test/tsan/fd_dup_norace2.cc
deleted file mode 100644
index 31aaed9d3..000000000
--- a/test/tsan/fd_dup_norace2.cc
+++ /dev/null
@@ -1,60 +0,0 @@
-// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
-#include "test.h"
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <errno.h>
-
-// dup2(oldfd, newfd) races with read(newfd).
-// This is not reported as race because:
-// 1. Some software dups a closed pipe in place of a socket before closing
-// the socket (to prevent races actually).
-// 2. Some daemons dup /dev/null in place of stdin/stdout.
-
-int fd;
-
-void *Thread(void *x) {
- char buf;
- int n = read(fd, &buf, 1);
- if (n != 1) {
- // This read can "legitimately" fail regadless of the fact that glibc claims
- // that "there is no instant in the middle of calling dup2 at which new is
- // closed and not yet a duplicate of old". Strace of the failing runs
- // looks as follows:
- //
- // [pid 122196] open("/dev/urandom", O_RDONLY) = 3
- // [pid 122196] open("/dev/urandom", O_RDONLY) = 4
- // Process 122382 attached
- // [pid 122382] read(3, <unfinished ...>
- // [pid 122196] dup2(4, 3 <unfinished ...>
- // [pid 122382] <... read resumed> 0x7fcd139960b7, 1) = -1 EBADF (Bad file descriptor)
- // [pid 122196] <... dup2 resumed> ) = 3
- // read failed: n=-1 errno=9
- //
- // The failing read does not interfere with what this test tests,
- // so we just ignore the failure.
- //
- // exit(printf("read failed: n=%d errno=%d\n", n, errno));
- }
- return 0;
-}
-
-int main() {
- fd = open("/dev/urandom", O_RDONLY);
- int fd2 = open("/dev/urandom", O_RDONLY);
- if (fd == -1 || fd2 == -1)
- exit(printf("open failed\n"));
- pthread_t th;
- pthread_create(&th, 0, Thread, 0);
- if (dup2(fd2, fd) == -1)
- exit(printf("dup2 failed\n"));
- pthread_join(th, 0);
- if (close(fd) == -1)
- exit(printf("close failed\n"));
- if (close(fd2) == -1)
- exit(printf("close failed\n"));
- fprintf(stderr, "DONE\n");
-}
-
-// CHECK-NOT: WARNING: ThreadSanitizer: data race
-// CHECK: DONE